A:Answer Yes, WD stands for Western Digital. No, I do not think AC power makes the drive any faster. The drive itself is rated at a certain speed. However, USB isn't always enough power to run external drives, some computers might send enough power over USB, and others might not, so many manufacturers will add AC power to power devices. In this case, the device is not designed to take power over USB, and therefore must be plugged in to a wall outlet.
